Polishing-machine.



.0.'L. DOSGH.

POLISHING momma. Arrmonmn FILED APR.29-,'1909. I Patented Dec. 24, 1912.

(SHEETS-SHEET 1.

H WITNESSES INVENTOR ATTORNEY 4 SHEBTS-SHEET 2 0. L. BOSCH.

POLISHING MACHINE. I APPLICATION FILED 10211.29. 1909.

Patented Dec.24,1-91

IVESSES': I

' WIT Patented. Dec. 24, 1912.

55 lA/I/ENTOR Mmsssrs;

ATTORNEY 0. L. nosoH. POLISHINGMAUHINE.

APPLICATION FILED APR.29, 1909.

Patented Dec. 24,' 1912.

4 SHEETS-SHEET 4.

I ml

i l l all";

- 'lm/Ervrol? 40 t times into contact UNITED strar as PATENT OFFICE.

OLIVER L. boson, or ELIZABETH, NEW JERSEY, ASSIGNOR TO THE smsnnMANUFAC- roams COMPANY, A CORPORATION or NEW. JERSEY. f

' romsnmc-macninnf Application filed April 29, '1909. Serial No.492,929.

To all whom it may concern: 7

Be it"known that I, OLIVER-L. DoscH, a citizen of the United States,residing at Elizabeth, in the 'county of Union and State of New Jersey,have invented certain new and useful Improvements in Polishing-Machines, of which the following is a specification, reference being hadtherein to the accompanying drawings.

This invention has for its object to provide a polishingmachine adaptedfor rap- .idly and effectively producing a smoothed polished surfaceupon various metallic obporting pulleys connected byca belt serving as abacking over which is applied a second belt provided upon its exposedface with abradmg material such as emery, the article to be polishedbeing pressed against the abrading belt in undergoing the polishingoperation.

In its preferred form, the present improvement includes a vgyratonvwork-supporting arm provided with a carrier for holding the work, sucharm being'pivotally mounted upon the machine frame in such manner as tomaintain the work by gravity pressed against the abrading belt, thegymtory movements of the work-supporting arm causing the work to bemoved to-and-fro across the abrading belt transversely of its directionof movement, whereby the entire movement.

surface of said belt is brought at different ished. Special means areprovided for oscillating the work-supporting arm so as to subject to theaction of the abrading belt the outer half of the rounded balance-wheelpulley rim to be polished, and the-said arm is mo inted upon ala'terallysliding carriage provided with suitable actuating means,whereby across the operative face of the .abradiug beltin addition toits described oscillatory Th work-supporting arm is Specification ofLetters Patent:

with the object to be pol;

which is journaled the the work is caused to travel bodily Patented Dec.24., 1912,

provided with a special form of work-holder with means for turning itswork-engaging member inthe opposite direction from the travel of theabrading belt, the axis of rotation of the work being inclined to thedirec tion of movement of the abradingi belt whereby the smoothness, ofthe'cut or abrasion is increased. v

In the accompanying drawings, Figure'fl is a partial end elevation of apolishing mach 1ne embodying the present improvements, Fig. '2 a partialfront elevation and Fig.3 a partial plan view of the same.

Fig. 4 is an elevation, partly in section, (if the driving inechanism ofthe machine and Fig, 5 a

transverse sectional elevation of the gearing and the casing inclosmgthe same. Fig. 6' 1s a detached sectional v1ew of the-means formaintaining the work suppo-rting arm retracted from operative positionfor introduction and removal of the work. Fig. 7 is a detached sideelevation of one of the adjustable bearings' of the upper supportingpulley for the backing and abrading belts.

Fig. 8 is a side view showing the manner of mounting the-adjustablebearing of'the rears wardpulley for the abrading belt. Figs. 9, 10, 11and I2 are detached views representing difi'erentparts of the transversefeedingmechanism for the work-supporting arm. Fig. 13 is an enlargedsectional plan v1ew of the work-holding device carried by thework-supporting 'arm, and" Fig. 14 a detached side elevation of thework-retaininmember thereof. I

Themachine is shown constructed with a frame comprising the base 1,,a-rearwardly extending member 2 and a standard 3 rising from the baseand surmount-edby the head or cross-beam At the front of the standard '3are disposed the fixed bearingsfi in driven shaft ,6, and the adjustablebearing blocks 7 in which is journaled the parallel shaft 8. Asrepresented in I. Fig. 7, each bearing block 7 is supported at oppositeends upon each of its.

four faces by the point-"of one ofthe adjusting screws 9 of two parallelseries which are tapped through the walls of the housing to receivetheblock 7 and v the slide-plate 1'1 fitted the front face block 10aperturcd itself formed upon to a suitable slide-way upon of thestandard 3 and provided with a projecting boss 12 having ail-internallythreaded aperture entered by the adjusting screw 13 swiveled in the lug14 which is bolted to the front of the standard 3. As will be readilyobserved, the turning of-the adjusting screw 13 will cause the raisingor loweringof the slide-plate 11, and hence of the bearing 7. which isadjustable both vertically and sidewise by means of the adjusting screws9.

The bifurcated member 2 of the frame is provided with parallel seats 15to which are fitted the side-plates 16, each being formed with a housingblock 17 embracing the bearing block 18 adjustably supported therein atopposite ends, similarly to the bearing block '7 befd're described, uponthe points of the screws 19 of two parallel series and affording abearing for the rearward pulley shaft 20. The slide-plates 16 are eachprovided with a longitudinal boss 21 entered by a uide-rod 22" extendinfrom a hub 23 b D vformed upon the standard 3, between which hub and thebottom of a longitudinal socket in the boss 21 is interposed a spring:24 acting to yieldingly press the slide-plate 16, and with it the shaft20, rearwardly from the shafts 6 and 8. As will be observed, the shaft20 can be accurately alined by adjustment of the two bearing blocks 18carried by the two slide-plates 16, by means of the adjusting screws 19.

As indicated in the drawings, the machine forming the subject of thisapplication is substantially duplex, the work-holding and polishingmembers being duplicated, and a description of one of the duplicatedgroups of mechanisms will therefore be suflicient.

Upon the outer ends of the lower or driving shaft 6 are disposed thedriving pulleys 25, the upper shafts 8 having secured thereon thesupporting pulleys 26. These pulleys are embraced by the verticallyarranged backing belts 27 which may be of leather or of any other usualor suitable material. Encircling each of the belts 27 with theirsupporting pulleys 25 and 26, and embracing also the rearward idlerpulley 2S fixed upon the rearward shaft 20. is the abrading belt 29,which is in practice composed of emery cloth, or of leather or of otherfibrous material having upon its outer face emery or other suitableabrading material. As will be observed by reference to Fig. 1, each belt29 is in contact with its respective backing belt 27 only at the frontof the machine and around portions of the supportpressed idler pulley 28which maintains it taut independently of the belt 27, under the actionof the springs 24.

As represented in Fig. 2, the shaft 6 carries, intermediate the bearings5 and between the spaced upright members 3 of the frame, the pulley 30which serves to transmit to the driving pulleys 25 their operativemovements through the belt 31 extending upwardly with one member passingthrough the a erture 31 in the cross-beam 4, to the line-s iafting orother source of power.

The cross-beam 4 is provided with the forwardly projecting spacedbearing bosses 32 within which is journaled the oscillating sectionalrock-shaft composed of the members 33 33*, each of the independentsections of which is provided adjacent the intermediate central bearingmember 32 with .ihe fixed thrust-collar 34 and adjacent its otherbearing member 32 with the thrust-collar to prevent endwise movement ofthe shaft section. These rock-shaft sections are provided upon theiropposite ends each with a transverse aperture in which is secured bymeans of the set-screw 35 the endwise adjustable cross-bar 36 providedupon opposite ends with spherical counter-balance weights 3'7.

Mounted upon the shaft 33 are the sleeves 38 which are formed withopenings 39 in the frontside intermediate the end portions, whichlatterare fitted upon the shaft so as to slide thereon; Each sleeve 38isprovided intermediate its ends with a forwardly pro-- jectinghorizontally bifurcated bearing boss 40 embracing a pinion 41 fixed upona vertical rock-shaft 42 journaled in said bearing boss and meshing witha series of rack-teeth 43 cut in the partially flatted forward side ofthe r0ck-shaft 33.

The work-support comprises a depending arm 44 having at its upper end ayoke with spaced laterally extending members 45 embracing the bearingboss 40 and rigidly attached to the opposite ends of the shaft 42 bymeans of the transverse pins 46. The members 45 of the yoke are disposedsubstantially in the plane of the rock-shaft- 42, 'butthe dependingwork-supporting arm 44 is arranged at a slight inclination with saidyoke and rock-shaft as indicated in Fig. 2. The rock-shaft 42 thusaffords an axis disposed longitudinally of but offset from thework-supporting arm 44 upon which the latter is caused .to oscillate byengagement of the rack teeth 43 with 'the pinion 41. v

The arm 44 is' formed at its lower end with a laterally extendingbracket 4?, and is provided near the adjacent end of said bracket withan aperture through which extends the hollow transverse shaft'4S uponwhich is fixed the crank-arm 49 carrying the outwardly extendingcrank-pin 50. The

shaft 48 is shown formed in its outer end with a slight enlargement toreceive the hub i a of a sewing machine balance wheel with rim 6connected with the belt-wheel afforded by the flanged and peripherallygrooved hub portion 0 by means of the spokes (Z between .sleeve- 52 isprovided with alongitudinal slot '5 .havinga transverse portionv '56inclmed t nearly arightangle to the'portion 55 and extending in thedirect-ion of rotat-ion of the shaft 48, Which-slot is entered by thereduced end portion 'of a locking screw 57 tapped into the hub '51 ofthe bracket- 47.

- The sleeve 52, which constitutes the dead spindle of the work-holder,is provided with a knob. 58 by which it may be turned and moved endwiseinto and out offcontact withthe work; and itis fitted with a plug 59,secured adjustably therein by means of set-scre'ws 60' toadjust-theposition' of the thimble 53 longitudinally in'relation to theshaft or live spindle 48. .The forward portion of the shaft 48 is formedin one sidewith a longitudinal slot 61 to receive the laterallyextending'finger 62- of the push-pin 63 extending through the hollowshaft 48 and providedat its opposite end with the knob 64 The finger 62is nor mally housed within. a recess in the outer end of the crank-arm49, but in order to eject the balance-wheel at the completion of apolishing operation, the rod 63 is thrust forward by pressureof the handupon the knob 64, which causes the-finger -62 to engage the inner end ofthe balancewheel hub and force the same offtheend of the shaft 48f; theknob 58 having previously been turned to disengage the stop-screw 57from the transverse portion 56 of the slot 55 and the sleeve 52 thenwithdrawn'to release the work.

As will be observed, the work-supporting arm ,44 is pivotally mounted bymeans of the yoke and sleeve 38 upon the rock-shaft 33, which isdisposed above theforward portion of the belt-pulley 26, and the rim ofthe bal-' ance-wheel isthus maintained by gravity in contact withthe'oute'r abrasive face of the polishing belt, resting'a gainst thesame intermediateand opposed to the idler pulleys 65 and 66 mounted uponsuitable brackets 67 and 68, respectively, attached to the front of thestandard 3. f l y As will be seen by reference to Fig. 2, the facesofthe pulleys 65 and 66 are narrower than hose of the belt supportingpulleys 25 and 26, and they arearranged' uponzoppo site sides ofthe-polishing point iii-relation to the direction of movement of thepolishing belt, and at the opposite sides of "said belt causes thelatter to conform to the pebelt in relation to the width of the latter,so

as tolie in an-oblique arrangement. By this a yielding abrading surfaceintermediate the upper idler pulley 65 and the-lower supporting pulley25,- and in the other half of said means, in one half of the travel ofthe work acrossthe polishing belt, thelatter presents travel a'similarly'yielding abrading surface is presented by the belt extendingfrom the] loweridler pulley 6.6 to the'upper supportng pulley 26. Itwill thus be seen thatthe side-thrust of the work upon the polishingbelt is sustained almost entirely by these idler pulleys, andvthatfitspressure upon the.

riphery of the circular object (such as a sewing machine balance wheel)to insure a much largerarc ofcontact than would be afforded without theuse of these idler pulleys.- It will be observed that the sleeves 38constitute reciprocating and rocking carriers for the work-holders whichare movable upon supporting fulcra afforded, in the present embodimentof the improvement, by the rock-shaft sections 33"and 33*; and it ise'vident that ,-the form of such carriers is not confined to that shownand described herein, so long as they perform the functions ascribed tothem herein. I

For convenient introduction and removal of the work, the work-supportingarm 44 is :provided with a lateral handle 69 by means of which it isdrawn forwardly, which causes the sleeve 38' and its supporting shaft 33to be oscillated suflicientlyto permit the shoul' der 70 of the detentlere1w71, pivoted at'72 upon a bracket 73 bolted to the member 4,

to-enga-ge the tooth 74. of the collar 75 fixed to said shaft, wherebythe arm 44 is maintained in retracted position until the detent lever 71is lifted by its handle 76, when the arm 44 is again permitted togravitate to its operative position. As shown in the drawings, one sideof the tooth 74 is inclinedin relation to the detainingshoulder'engag'ing theshoulder 70 of the lever 71, whereby the detainingleveris'adapted to rest normally upon said tooth when the arm 44 is inoperative position; but when the work-supporting arm is retracted, andits supporting sleeve '38 rocked with the oscillatory rack-bar 33,

the collar 75 is turned sufficiently to permit the shoulder 70 of thelever 71 to drop behind the abrupt shoulder of the detaining tooth 74,whereby the parts are retained in retracted.v positionuntil the lever israised to release the tooth 74 as previously described.

As indicated in the drawings, and more particularly-in Figs; and 13,upon the end ofthe' shaft 48 opposite that upon which the work issupport-ed is secured by means :of the splinev 77 the-bevel-wheel78*whosehub 795s jo-u'rnaled in the base of the arm a'nd'meshing withthis bevel-wheel is asirni-lar -g'ea'r 80 fixed" updh the lower end ofan actuating shaft 81 extending through the hollow arm 44: and journaled in suitable bearings provided at opposite ends thereof, thisshaft being driven by means which will later be described to turn thework-holding shaft 48, and hence the object to be polished,

in'a direction opposite to that of the polishing belt 29.

Fixed upon the horizontally disposedcam-shaft 82 which is mounted insuitable bearings 83 rising from the cross-beam 4 is the feedcam-cylinder 8i provided with the substantially heart-shaped cam-groove85 which is entered by a roller-stud 86 carried by the collar 87 securedby means of the pin 88 upon the reciprocatlng bar 89 slidingly supportedupon the cross-beam 4 parallel with the feed-cam shaft 82 and the1'0ck-shaft33. As represented in Figs. 3, 11 and 12, the reciprocatingbar 89 is provided upon opposite sides of the collar 87 with laterallydisposed longitudinal angular grooves 90 each of which is entered by aroller-stud 91 carried by a screw 92tapped into the forward end of thebearing member 83. As the angular slots 90 are arranged respectivelyabove and below the center of the rod 89, it will be observed that theroller-studs 91 serve to prevent the turning of the same in eitherdirection, while permitting its free endwise movement.

F ixed L djustably uponthe opposite end portions of the bar 89 by meansof setscrews 93 are tubular sleeves 94 each provided in its lower sidewith a transverse notch adapted to be entered by the rearwardlyprofecting lug 96 upon one of the sliding sleeves 38, said lug,beingformed with a notch 97 conforming in curvature with the surface of thereciprocating bar 89, and being substantially of the width of the notch95 in the sleeve 91in As will be observed the opposite ends of the slot95 in the sleeve 94; constitute coupling shoulders which are normallyengaged by the shoulders afforded by the opposite ends of the lug 96extending from the sleeve 38. the members of the coupling so con titutedbeing disei'igaggcd by the rocking of the sleeve in the withdrawal ofthe vvork-siupporting arm 4-!- irom operative relation with ,theabrading n'ir-mlcr afforded by the polishing belt 29. It is evid it thatany other suitable device may be employed for detachably connecting theoscillatory and reciprocating sleeve 8 with the ting teed-cam St 85.

Fixed upon one of the cam-shaft 8:? is

i ll

:1 bevel-wheel 98 witx'l which meshes the similar bevel-vend. at the vmcated .by means of the notched sleeves 94 and lugs 96 upon the sleeves38 to impart similar 'movements to said seeves, which causes thework-supporting arms at to be carried bodily crosswise of the directionof movement of the abrading belt 29; while the engagement of the pinions41 with the racks 43 cut in the sides'of the rock-shaft 33 induces asimultaneous oscillatory movement of said worlcslipporting arms, whichserves to turn thework-holding bracket-ar'n t? around the rock-shaft 42as an axis, so as to progressively present to the operative face of thebelt 29 the exposed semi-ciroular surface of the balance-v, heel rim 5for the polishing operation.

weighted counter-balance rods 36 may be shifted endwise in one or theother direction so as to adjust-the pressure of the article to bepolished upon the abrading belt, this being accomplished through theroot-shaft and the depending arm 44, which is locked from turning uponthe same by the engagement of the pinions 41 with the rack members 43. 4

While both the abrading belts 29 may be provided with operative faces ofthe same degree of coarseness, in practice they are sometimes made ofdifferent character, so that one may be employed as a roughing memberand the other as a finishing member, for successive use upon each objectto be polished. By forming the rock-shaft for. sustaining thework-supporting arms in independent sections, it will be observed thatthe work-holders may be retracted and returned to operative positionalternately, in order to prevent the vloss of time. of having oneportion of the machine idle while the work is being introduced orwithdrawn from the other portion.

hen one of the work-supporting arms 44 is retracted, it is obvicus thatthe lug 96 is disengaged from its slot 95 in the reciprocating sleeve94:. and the bodily and oscillating movements of the worloholder'aresuspended. After the renewal of work in the work-holder. the raising ofthe detentlever permits the arm 44 to gravitate toward the abrading belt'29, until the lug 96 rests upon the exterior of its propelling sleeve94. in which position it remains to maintain the work still out ofcontact with the abrading member until the notch 95 comes into registerwith said lug, when the latter enters the notch and permits therocictuating the backing and abrading belts is As will be readily observed, by loosening the set-screws 35, thederived from the drivingshaft by means of the pulley 30 connected by the belt 31 with: anoverhead pulley of suitable line shaftin'g; and the movements of thework in relation to the abrading belt' are derived from an overheadcounter-shaft'102 mountwhich it derives its rotary movements, and

' it has fixed thereonthe spiral gears 107 and 108, and intermediateworm-gear 109 which meshes in turn with a worm-wheel 110 fixed upon thevertical sectional shaft 111 112, the upper section of which isjournaled in the gear case 104. .The shaft section 111 is providedexternallywith the longitudinal groove 111 which is entered by theinwardly extending spline or key 112 of the tubular lc-wer shaft section112 connected at its lowerend by means of the 'cross-pin 113 with theshouldered upper endof the feed drive shaft 100.

Fixed upon the vertical shaft-sections 11 1 journaled in the gear casing104, are the spiral gears 115 meshing with the similar gears 107108,-respectively, uponthe coun-v t'er-shaft 102. .Each of thesevertical shafts 114 is connected by a universal joint 116, of anywell-known or suitable construction, with the upper? end of ashaft-section117 I, provided externally, with a longitudinal' groove 118 entered-by the inwardly pro ect-' ingkey or feather 119 of-the tubularshaft section 120 entered in the'upper port-ion by the section 117 and.having at its lower end a universal joint connection 121,- through asuitable coupling 122 with the'upper end of the inclined work-holderactuatingshaft 81. As will be observed, the gear casing 104 is inpractice so located above the machine thatthe shaft section 111 is indirect alineme'nt with .the'shaft- 100 for communieating operativemovements to the feedcam; but as the work-holder actuating shafts 81have gyratory and lateral movements upon the machine frame, it isobviously necessary to employ connections between the shaft members 81and 114 which shall accommodate'such movements, but it.

is evident that the telescopic sections 117 and 120 may be readilyreplaced by flexible shafting of other kinds, if desired. In order to.expose the entire outer face of the pulleyrim Z) to the action of theabrading belt 29, it is requisite that; the work-holding bracket :47;should have .a bodily movement exceeding the width of the operative faceof the abrading belt, so that the pulley-rim may beat all times directedfrom the hub portion toward the belt. By offsetting the bracket 47from'the rock-shaft 43, andhencegfr'o'm its axis of .65 movement, andimparting to the arm 44 the which is arranged in a plane parallel with.

lateraltraveling movements as well as turn ing movements upon the. shaft12, the work is constantly maintained in operative contactwith theabradingbeltand in progreelsively varying angular relation there-- WitHaving thus set forth the nature of the invention, what I claim hereinis 1. In a machine of the class described, the. combination withanabrading member and driving means therefor, of a workholder forsustaining the work in contact with said abrading'member, feeding meansconnected with said work-holder for causingit'to travel transversely ofthe direction' of movement of said abrading member a distance greaterthan the width of the operative face of the latter, and means connectedwith the work-holder whereby the work is constantly directed upon theabrading member and from which it derives circular movements uponangularly arranged. axes one ofwhich is disposed in a plane sub-"stant-ially parallel with thedirection o foperative movementof theabrading member.

2. In a machine of, the class described,

.the combination with. anabrading member and driving means therefor, ofa workholder, sustaining means therefor including twoflangularlydisposed rock-shafts one of 9b thedirection of movement of the abradingmember, means for imparting to the work-' holder swinging movements uponsaid rockshafts to expose the work mounted therein to the abradingmember in different angular relations, and means for [imparting to thework-holder feeding movements transverse to the direction of movement ofthe abrading member. I

3. I11 a' machine of the class described,

the combinat-ion with an abrading member having a.yielding operativeface and "driving means therefor, of a movable, .workholder, a swingingarm for supporting the '110 same, afulcrumfor. said arm,'a' second arm'supported by said fulcrum in angular relation' with t-he=.firstnamedarm, a weight secured upon. the second-named: arm andadjustabletowardand from said fulcrum,

and feeding means connected with said Work-holder for causing the Workto travel transversely of: thefldirec'tio-n. of movement]ofsaid'abrading-member. I 1 i the combination. with an abrading member,and means for sustaining and driving'the same including a rotary shaft,of a workholder for sustaining the work in contactwith said abradingmember, means for mov- 125 ing the work-holder crosswise of the face ofthe abrading member substantially parallelwith said shaft, and means forsimultaneously imparting to said work-holder circular movements uponaxesrespectively 4. In a machine of the class described, 120

. Work-holder; feeding means connected therewith for causing itto traveltransversely of the direction of movement of said abrading member, andmechanism, including a rackbar with means. for sustaining it againstendwise movement and a pinion meshing therewith and sustained inoperative relation with the work-holder, for imparting an oscillatorymovement-to the latter.

6. In a machine of the class described, the combinatien with an abradingmember, and means for sustaining and driving the same including a rotaryshaft, of a carrier, a supporting fulcrum for said carrier substantiallyparallel with said shaft and along which the carrier is adapted totravel, a swinging work-holder pivotally mounted upon said carriertransversely of said fulcrum, and means for moving said carrierlengthwise of its fulcrum.

7. In a machine of the class described, the combination with an abradingmember and driving means therefor, of a swinging wortholder having apivotal support and adapted to hold the work by gravity in operativerelation ith the latter, and feeding means connected with saidwork-holder to cause the Wo-rkto travel transversely of the direction ofmovement of said abrading member.

8. In a machine of the class described, the

combination with an abrading member and driving means therefor, of arock-shaft, a swinging work-holder mounted thereon to partake of itsrocking movements, an arm fired upon said rock-shaft in angular relationwith said work-holder, and a weight adjustably secured upon said arm tocause the work-holder to maintain the work in yielding contact with saidabrading member. '9. In a machine of the class described, thecombination with an abrading member and driving means therefor, of awork-supporting arm mounted to vibrate upon a fixed fulcrum, means forturning said arm upon an axis in angular relation with said fulcrum, and)VOlk-l'lOldlDg means carried by said arm and ofl set from said axis.

10. In a machine of the class described.

the combination with an abrading member.

and driving means therefor, of a traveling work-support provided withwork-holding means, a fulcrum-bar upcn which said worksupport is mountedfor laterally swinging and sidewise traveling movements, and a' thecombination with an abi'ading member and driving means therefor, of atraveling work-support provided with work-holding means, a. fulcrum-bardisposed rearward of the operative face of the abrading member and uponwhich saidwork-support is suspended to maintain the work by gravity incontact with the abrading member, means for moving the work-supportlengthwise of said fulcrum-bar and across the operative face of theabrading member, and a connection between said work-support andfulcrum-bar for varying the angular relation of the work to the abradingmember.

12. In a machine of the class described, the combination with anabrading member and driving means therefor, of a traveling work-supportmovable transversely of the direction of movement of the abradingmemher,a rotary work-holding spindle carried by said traveling work-support andinclined in relation to the direction of movement of the abradingmember, and means for turning said work-holding spindle.

18. In a machine of the class described, the combination with anabrading member and driving means therefor, of a worksupport comprisinga bracket formed with spaced bearing members, a live spindle mounted inone of said bearing members and provided with a bearing portion toreceive the work and with a crank-arm for positive engagement with thework, a retractable retainer mounted in another bearing member of saidbracket and adapted to hold the work 111 ])(Slti011 upon said spindle,and an ejector acting in opposition to said retainer for dis chargingthe work after retraction of the retainer from operative relationtherewith.

14:. In a machine of the class described, the combination with anabrading member and driving means therefor, of a movable work-support, atubular live spindle mounted therein and provided with a longitudinallyslotted work supporting portion, means for driving said live spindle, are tractable retainer for holding the work in position upon said livespindle, and a pushrod. entering the hollow live spindle and providedwith a lateral work-ejecting finger extending through the longitudinalslot of said spindle.

15. In a machine of the class described, the combination with anabrading member and driving means therefor, of a movable work-support, alive spindle mounted therein for carrying the work, means for drivingsaid live spindle, an endwise and cir cularly movable cylindricalwork-retaining member also mounted in said work-support and providedwith a longitudinal slot with a transverse extension at one end, and astop-pin carried by said work-support and entering the longitudinal slotof said retaining member.

"16. In a machine of the class described,

the combination with an abrading member and driving means therefor, of amovable work-support, a live spindle mounted therein for carryingthework, means for driving said-live spindle, an endwise andci-rcularlymovable tubular workretaining member also mounted in said worksupportand provided with locking means for holdingit in operativeposition, and a'work-engaging thimble fitted loosely within theoperative end of said work-retaining member and formed with an axialcavity to receive the adj acentend of said live spindle.

17. In a machine of the class the combinationjwith an abradin-g member 1and driving means therefor, of a movable VOPlXr-S UPIJ OTt a livespindle mounted there in for carrying the'work, means for drivingsaidlive spindle, an endwise and circularly movable tubular work-retainingmember also mounted in said work support and provided withlocking meansfor holding it in operative position, and a work-engaging thimble fittedloosely within and longitudinally adjustablein the operative end of saidwork-retaining- .member and formed with an axial cavity to receive theadjacent end of said live spindle; Y

18. In a machine of the class described, the combination with apolishing belt pro- 1 vided with an abrasive operative face, supportingpulleys for said belt, and means applied to one of-said pulleys fordriving the same, of a work-holder for presenting the work tothe'operative face of said belt in termediate its supporting pulleys,and spaced idler ipulleys adjustable toward and from each other'anddisposed at opposite sides of. tl1e point of applicationof the work andat the back'of the abrading belt for sustaining the thrust of the work.

19. In a machine oflthe class described,

the combination with a polishing belt pro-,

vided withan abrasive operative face, sup- )ortin ullevs for said beltand meansapplied-to one of said pulleys for driving the same, of awork-holder for presenting the work to the operative face of said belt.intermediate its supporting" pulleys, and idler pulleys disposed atopposite sides of the width of the belt andspaced apart inthe directionof movement 0 the belt upon opposite sides of the point f application ofthe work to said belt.

-20. In a machine-of the: class described,

I the combination with an abrading member and driving means therefor, of[a movable work-supporting arm, a rack-bar mounted upon a fixed' supporttransversely of the direction of movement of the operative face of, saidabrading member, a reciprocating -sleeve fadjaccnt said rack-bar, arock-shaft journaled in said sleeve andvhaving said work-supporting armfixed thereto, a pinion described,

fixed upon said rocleshaft and adapted t(.

mesh with the teeth of said rack-bar", and

of said sleeve and having the spaced members of the yoke of saidwork-supporting arm fixed thereon and embracing said boss,

mediate the spaced-members of saidboss and adapted to mesh with'theteeth of said rack-bar, and means for reciprocating said sleeve toimpart bodily reciprocatory'and oscillating movements to said worksupport, ing arm.-

22. In a machine of theclass described, the combination with. anabradingmemb'er and driving means therefor, of a movable work-supportingarm, a rack bar mounted .upon a fixed support transversely of thedirection of movement of the operative faceof said abradmg member, areciprocating sleeve mountedupon said rack-bar which affords a.fulcrumupon which the sam;: is adapted to oscillate, a rock-shaft journaled insaid sleeve and having said work-supporting arm fixed thereto, a pinionfixed upon said rock-shaft-and adapted t-0 'InSll with the teetlrof saidrack-bar, and means for reciprocating said sleeve to impart bodilyreciprocatory and oscillating move: ments to said work-supporting arm.

23. In a machine of the class described, the combination with anabrading member a pinion fixed upon said rock-shaft interand drivingmeans therefor, of a rack-bar mounted for oscillation upon a fixedsupporttransversely of the direction of movement of the operativeface ofsaid abrading -member,' a reciprocating sleeve mounted upon saidrack-bar with which it is adapted to oscillate, a work s'upporti-ng armpivotally mounted upon said reciprocating sleeve and having rigidlyconnected therewith a pinion meshing with saidrack-bar, and

means for reciprocating said sleeve to impart bodily reciprocatory andoscillating movements to said work-supportmgarm.

24.- I-na machine of the class described, theicornbination with anabrading member and driving means therefor, of a rack-bar monnted jforoscillation upon afixed support transversely of the direction of move.-

ment of the operative face of said abradrec ing member, a reciprocatingsleeve mounted upon said rack-bar with which it is adapted to oscillate,a worlosupporting arinpivot ally mounted upon said reciprocating sleeveand having rigidly connected therewith a pinion meshing with saidrachbar, means for reciprocating v said 'sleeve to impart bodilyreciprocatory and oscillating move ments to said work-supporting arm, adetent shoulder carried by said oscillatory rackbar, and a movable stopmounted upon sf fixed part of the machine and movable into and out ofoperative relation with said detent shoulder.

35. In a machine ofthe class described, the combination with an abradingmember and driving means therefor, of a rack-bar mounted for oscillationupon fixed sup port transversely of the direction of move- .ment of the'-,operative taco of saidiabrading n1e1nber,-,a reciprocating sleevemounted upon sstidraclebar with which it is adapted to oscillate, worltsupporting arm pivot ally mounted upon said reciprocating sleeve andhaving rigidly connected therewith s, pinion meshing with said rack-bar,means for reciprocating said sleeve to impart bodil reciorocatorv' andoscillatin movements to said work-supporting arm, a collar fixed uponsald oscillatory rack-bar and )rovided with e detainin tooth and a stowork to the abrasive face of the belt, means connected with saidsleeve-to impart bodily member, a

lever with {1 depending shoulder pivotally mounted upon a fixed part ofthe machine and adapted to normally rest upon said fixed collar-and tooperatively engage said tooth with its depending shoulder when saidsleeve is rocked into extreme inoperative position with the work-supportretracted from operative relation withsaid belt,

26. In a machine of the class described,

reciprocalory and oscillating movements to said work-supgtiorting arm,and means, in cluding a shaft-disposed longitudinally of saidworlesupporting arm, for imparting rotary movements to said work-holdingv spindle.

27. In a machine of the class described, the combination with anubrading member and driving means therefor, of a raclf-bar mounted foroscillation upon a fixed supvfor actuating the same, end an oper'zitiveconnect on intermediate the feed-cam and said CEHTIQI wherebyreciprocetory i'nove direction of mo no ions port transversely of; thedirection or" moves.

n ent of the operative face of said shreding membena reciprocatingsleeve mounted upon said rack-bar with which 1t 18 adapted toosoillateya work suppo'rting arm pivotally mounted uponseidreclprocating sleeve and extending therefrom st an inclination to itssupporting pivot and having rigidly connected therewith a'pinion meshingwith said rack-bar, a Workaholding spindlecarri'ed by saidwork-supporting arm and adapted to present the Work to the abrasive faceof the belt, means connected with said sleeve to impart bodilyreciprocatory and oscillating movements to said work-supporting arm, andmeans, incl tding aishaft disposed longitudinally of said work-support:in arm, for impsrti g" rotary movements to said worloholding spindle.

28. ln a machine of 'he class described,

'ih-rading member etor, of a support-;

the combination and actuating means .3 ing iulcrum-har disposed aboveand parallel with the operative. face of the; abrad ng i ith meansfoe-sustmeinber and provided tail ng it again:

oscillating and recipi ed upon and movable loh'gitn'ilinallyof saidfulcrum-bar, a swin i ork-sup'porting' 1:: arm sustained by said carrierand adapted to present the worlcto the operative'jtaceot the abradingmember, a feed-cam, 'Inea s ments are i uni-ted to the latter independently ofssi supporting fulcrum-bar.

devise movement, an .g carriermount-f too 2-9. ln s machine otthe classdescribed,

the con'zbination with an abrading member and. driving means therefor,of a reciprocatrier is adapted to move transvers ly of the enient ofsaid abrading unporting arin sustains member, a we by oerrn work to theo; 'e face of the abrndingmember, a 1, an endn'ise movable baractuate-s. by s feed-cam, a connection intermediate said bar and saidcarrier and provided with interlocking couplii'ig men hers adapted to beshi at will into and out of operativeengagement, and means for actuatingsaid 3G, in of the class described, the comhin: on abraoing member and{lslV 9f nieens therefor, ot a reciprochin g eatery a support upon whichsaid carrier s adnptcd to reciprocate transwrs l on of movement of saidlibrading nieznb .i we l t-supporting arin sustained by sale carrier andadapted to present the work to the operative face of theabradingf'member, a feed-cam, an endwise movable bar actuated by saidfeedoain, a detachable conn 'ion between said carrier, supporttuponwhich said car- 7 adapted to present the bar and said carrier, thesamebeing thrown into operative and inoperative'relation by the'oscillatorymovements'of said carrler,

- and means for actuating said feed-cam.

catory rocking carrier, a support upon which said carrier is adapted toreciprocate transversely ofvthe direction of movement of said abradinmember, a work-supporting arm sustaine .by said carrier and adap'te topre'sentthework-to the operative face of member, a'feed-cam, an endwisemovab e bar provided with a 'later'aL 1 coupling shoulder and actuatedby said feedcam, a yoke'extending from said carrier and normallyengaging the coupling shoulder.

of said bar, but adapted to bedetached therefrom when said carrier isrocked upon its support, and m'e'ans'for actuating said 32. In a machineof the class. described, the combination with an abrading member anddriving means therefor, of a traveling work -holder, means for rotatingthe same including a rotary shaft, a counter-shaft, a plurality ofcross-shafts, angular gearing connecting the counter-shaft with oneofsaid cross-shafts, an intermediate shaft with universal jointconnections respectively with said work-holder, worm gearing connectingthe'countens'haftwith another of said crossshafts, and means connectedwith the latter for effecting the travel of said work-holder crosswiseof the abrading member.

In testimony whereof, I have signed my name :to this specification, in Ithe} presence of two subscribing. witnesses;

' OLIVER L. DOSCH.

Witnesses:

HENRY J (MILLER, JOSEPH .F. J AQUITEL said cross-shaft and the actuatingshaft of"

